Ok, I have no idea how hard this would be to create but - a way for a user to go anonymous for a single post, without creating a whole new account. So they could have a little check box in the "Write a Post" box that says "Post Anonymously" and it would just show up in that post as "Anonymous".

That way if people want to ask a really delicate question or announce a pregnancy or something and they don't want anyone to know it's them, they can do that without having to make a whole new account tied to another email address.

That might be way more work than it's worth, so... just a thought.